国际英语新闻：Security breach delayed numerous flights in Los Angeles

According to officials, around 200 passengers stood in line outside the three affected terminals waiting to be screened while authorities searched for the man. Passengers who had already been screened were allowed to pass through.

Police officers at LAX have increased patrols in the terminals and along the facility's perimeter following the United Airlines bomb scare involving a passenger who was identified as 27-year-old Qatari midlevel diplomat Mohammed al Madidi, who was posted at Qatar embassy in Washington.

"In light of a reported incident on board a United Airlines flight enroute to Denver Airport from Washington D.C, Los Angeles Airport Police has raised its security profile and visibility," Police Chief George Centeno said in a statement released after the bomb scare.

"Heightened uniformed traffic and terminal foot beats, as well as, perimeter patrols have been deployed. Los Angeles Airport Police also have additional security measures in place that are considered security sensitive," he said.

The Qatari was detained and questioned after he apparently tried to sneak a smoke in a bathroom on the United Airlines flight which originated from Ronald Reagan National Airport in Washington D.C. No explosives were found on the man and the airliner, and officials do not believe he was trying to harm anyone. Security officials who did not want themselves to be identified said the diplomat was not expected to be criminally charged. He has been released from custody.

However, the incident sparked a bomb scare that resulted in two F-16 fighter jets being scrambled to escort the plane into a remote area of Denver International Airport.

Aside from the Qatari envoy, all the 157 passengers and six crew members aboard the Boeing 757 were also interviewed by FBI agents